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All Journal International conference on Information Technology and Business (ICITB) Indonesian Journal of Chemical Science REACTOR : Journal of Research On Chemistry And Engineering Jurnal Teknologi dan Inovasi Industri
Elida Purba
Department of Chemical Engineering, Faculty of Engineering, Lampung University, Bandar Lampung 35145
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Energy

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Models Of Sustainable Quality To Improve Implementation Of Quality System Of Qualified Enterprise -, Fitria; -, Yulmaini; Purba, Elida; -, Murhadi
Prosiding International conference on Information Technology and Business (ICITB) 2017: INTERNATIONAL CONFERENCE ON INFORMATION TECHNOLOGY AND BUSINESS (ICITB) 3
Publisher : Prosiding International conference on Information Technology and Business (ICITB)

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The implementation of quality assurance is based on documents, namely academic documents and quality documents. Academic documents as a plan or standard. The academic document contains the direction/policy, vision-mission, educational standards, research, and community service, as well as academic rules. In contrast to academic documents, quality documents as instruments to achieve and meet established standards. The quality documents consist of quality manuals, procedure manuals, work instructions, supporting documents, and forms. [6] University Quality Assurance It is a Stakeholder concept where university quality assurance system is performed on the basis of internal quality assurance, external quality assurance and program implementation permit. Internal quality assurance is quality assurance conducted by university institution in the way that defined by implementing university. The parameters and methods of measuring the results are determined by the college according to its vision and mission. By carrying out internal quality assurance, the higher education institution should conduct an internal evaluation called periodical self-evaluation. Self-evaluation is intended to seek Guidance of Quality Assurance System of Higher Education with continuous quality improvement. Keywords : Quality Assurance System, Achievement, and College.
The CO2 Gas Absorption in Biogas Using Absorber Bubble Column with Variation of NaOH Absorbent Concentration and Sparger Forms Purba, Elida; Rehmalem Barutu, Cecellia Nia
Indonesian Journal of Chemical Science Vol 10 No 1 (2021)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v10i1.46471

Abstract

Biogas consists of CH4 50-70%, CO2 25-45%, and a small amount of H2, N2, and H2S. The quality of the biogas can be improved by removing the carbon dioxide content so that the gas can be used for fuel. This research discusses the biogas purification process using NaOH solution as the absorbent to determine the effect of the concentration of NaOH and the shape of the sparger on the CO2 absorption process in biogas using a bubble column. NaOH solution with a concentration of 2,75 M; 3 M; 3,25 M of 2 liters was inserted into the column with a diameter of 3 in. The biogas and absorbent are contacted in the opposite direction with a biogas flow rate of 1 liter/minute. Variations in the shape of the sparger used are the types of pipes and rings. Sample analysis was performed with Gas Chromatography 2014 AT (SHIMADZU corp 08128). From the research results, the higher the absorbent concentration the higher the percentage of CO2 absorption, but it is not known the best sparger design because of the difference in the number of holes and the length of the sparger. The most optimum percentage of CO2 absorption is 98.211% with a variation of the concentration of 3.25 M and a sparger with a pipe shape.
The CO2 Gas Absorption in Biogas Using Absorber Bubble Column with Variation of NaOH Absorbent Concentration and Sparger Forms Purba, Elida; Rehmalem Barutu, Cecellia Nia
Indonesian Journal of Chemical Science Vol 10 No 1 (2021)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/ijcs.v10i1.46471

Abstract

Biogas consists of CH4 50-70%, CO2 25-45%, and a small amount of H2, N2, and H2S. The quality of the biogas can be improved by removing the carbon dioxide content so that the gas can be used for fuel. This research discusses the biogas purification process using NaOH solution as the absorbent to determine the effect of the concentration of NaOH and the shape of the sparger on the CO2 absorption process in biogas using a bubble column. NaOH solution with a concentration of 2,75 M; 3 M; 3,25 M of 2 liters was inserted into the column with a diameter of 3 in. The biogas and absorbent are contacted in the opposite direction with a biogas flow rate of 1 liter/minute. Variations in the shape of the sparger used are the types of pipes and rings. Sample analysis was performed with Gas Chromatography 2014 AT (SHIMADZU corp 08128). From the research results, the higher the absorbent concentration the higher the percentage of CO2 absorption, but it is not known the best sparger design because of the difference in the number of holes and the length of the sparger. The most optimum percentage of CO2 absorption is 98.211% with a variation of the concentration of 3.25 M and a sparger with a pipe shape.
Absorpsi Gas Karbondioksida Dalam Biogas Dengan Variasi Laju Alir Biogas dan Laju Alir Absorben Isya, Ismail Muhammad; Purba, Elida
Jurnal Teknologi dan Inovasi Industri (JTII) Vol 4, No 1 (2023)
Publisher : Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtii.v4i1.58

Abstract

Absorpsi merupakan salah satu proses separasi dimana suatu campuran gas dikontakkan dengan suatu cairan penyerap tertentu sehingga komponen gas tersebut larut dalam cairannya. Banyak yang mempengaruhi proses absorbsi salah satunya adalah laju alir adsorben dan laju alir biogas dapat mempengaruhi kenaikan persen kandungan CO2 yang terserap. maka pada penelitian ini akan melakukan penelitian pemurnian biogas menggunakan proses absorpsi dengan variasi laju alir absorben 150, 300 dan 450 ml/menit dan laju alir biogas 100, 250 dan 400 ml/menit untuk mengetahui pengaruhnyaterhadap proses penyerapan gas CO2 dalam biogas menggunakan kolom jenis Wetted wall column. Berdasarkan hasil penelitian, laju alir gas optimum adalah sebesar 100 ml/menit dan laju alir absorben optimum yaitu sebesar 150 ml/menit dengan persentase penyerapan CO2 95,91 % dan persentase peningkatan CH4 sebesar 62,2 %. Dan dapat kita simpulkanbahwa semakin kecil laju alir biogas dan laju alir absorben maka semakin tinggi penyerapan CO2.
Aplikasi Low-Cost Sorbent dari Lignite pada Tanah Bekas Penambangan Batubara terhadap Immobilisasi Logam Cr Haviz, Muhammad; Ibrahim, Nurul Fatiha; Azhar, Azhar; Taharuddin, Taharuddin; Purba, Elida; Darmansyah, Darmansyah; Lesmana, Donny
Jurnal Teknologi dan Inovasi Industri (JTII) Vol 4, No 1 (2023)
Publisher : Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtii.v4i1.60

Abstract

Provinsi Jambi memiliki cadangan batubara sebesar ±18 juta ton, yang sebagian besarnya merupakan batubara kelas kalori sedang. Cadangan batubara yang besar berakibat terhadap banyaknya jumlah penambangan batubara terjadi. Penambangan batubara yang banyak tidak diseimbangi dengan pengelolaan terhadap lingkungan, yang berdampak terkontaminasinya tanah bekas tambang batubara oleh logam berat. Salah satu logam berat yang mencemari lahan bekas tambang batubara adalah Cr atau kromium. Logam Cr pada lahan bekas tambang biasanya ditemukan sekitar 1645 ppm sedangkan baku mutu logam berat Cr 2-5ppm. Untuk mengurangi kadar logam berat Cr dapat dilakukan dengan imobilisasi logam menggunakan low-cost sorbent (LCS) yang berasal dari barubara muda (lignite) pada metode batch experiment. Berdasarkan data yang diperoleh kandungan logam berat Cr diukur dengan spektroskopi serapan Atom (AAS), dengan neggunakan variasi biochar 0%, 5%,10%, dan 15% didapatkan imobilisasi optimal logam berat Cr pada variasi biochar 15% dimana logam yang terserap 0.0936mg/g.
Absorpsi CO2 Pada Wetted Wall Column dengan Variasi Laju Alir NaOH dan Konsentrasi Methyldiethanolamine Purba, Elida; Simbolon , Rio Riski
REACTOR: Journal of Research on Chemistry and Engineering Vol. 4 No. 1 (2023)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/

Abstract

This research describes the biogas purification process by reducing CO 2 content using NaOH solution as an absorbent and methyldiethanolamine (MDEA) as a promoter in Wetted Wall Column (WWC). The purpose of this study was to determine the effect of MDEA concentration and flow rate of NaOH + MDEA solution on CO 2 absorption. The column is made of acrylic material with a diameter of 4.5 cm, height 50 cm, equipped with a tube with a diameter of 1.27 cm, height 45 cm. The tube is in the center of the column. The flow rate of absorbent solution for each run was varied as 150, 200, 250 and 300 ml/min and the concentration of MDEA for each run was 4% wt and 6% wt in 1 M NaOH. The biogas flow rate was 6 L/min, which was fed from the bottom of the column. The samples were analyzed by Gas Chromatography 2014 AT (SHIMADZU Corp 08128). The results showed that at 6% NaOH + MDEA solution, the solution flow rate of 150 mL/min was the best. Under these conditions, the output CO 2 content is 13.306% and the output CH4 content is 81.737%. The results of the output CO 2 content did not reach the 90% target because the biogas was contaminated by gas from the environment and the lack of control over the condition of the equipment during the absorption process.
Co-Authors -, Murhadi Azhar Azhar Donny Lesmana Fitria - Ibrahim, Nurul Fatiha Isya, Ismail Muhammad M. Haviz Rehmalem Barutu, Cecellia Nia Simbolon , Rio Riski Solly Aryza Taharuddin Taharuddin Yulmaini Yulmaini